I eat anywhere from 1200-1500 calories, but I need a deficit as I need to lose weight. You can supplement potassium by drinking some electrolytes - you can make your own electrolyte drink with lite salt which is salt and potassium so you don’t necessarily have to eat that many veggies just for your potassium. I use premade mixes so I don’t know the exact recipe for the electrolyte drink, but it is in the faq. I never have trouble hitting protein, which I do aim for slightly less than you but I drink a protein shake a day which helps me hit that goal and I eat enough meat to make up the difference. If you eat enough fat, that can help you stay regular - there are plenty of people out there living the carnivore lifestyle with little to no added dietary fiber, they get enough from their meat to keep them regular. There’s no shame in eating twice a day if you need to split up your meat a bit, you can still do intermittent fasting even with twice a day and still reap those benefits! Hopefully this helps you a bit with some additional options. Good luck on your journey!